SATO CL4NX Programming Reference Manual page 560

(3) 1 port connection (Status 3 return)
STX
1 byte number
02H
Please refer to the "2.42.2.1
3) Sequence
(1) Status 4/Cyclic response mode (2 ports connection or 1 port connection)
The printer will return the status in the interval of 500 to 1000 msec. When receiving a status request command
(ENQ: 05H) from the host, the printer returns the latest printer status data.
CONNECT
（Port1024、Port1025、
or Port9100)
CONNECT SUCCESS
Connection
Status request
(Port 1025 or Port 9100)
(ENQ "05H")
(Port 1025 or Port 9100)
CLOSE
(Port 1024, Port 1025,
or Port9100)
CONNECT END
ID Status Remaining
1 byte print q'ty
6 byte
2 byte
Return status of status 3
Host
ETX
1 byte
03H
(Total: 11 bytes)
" for the status contents.
Printer
LISTEN
ACCEPT
Printer status (in about 500 - 1000 msec
interval) Port 1025 or Port 9100
The latest printer status
Printer status
CLOSE
LISTEN
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